Fusible switch for electrically-heated elements



March 10, 1931. w. s. MARVIN ETAL FUSIBLE SWITCH FOR ELECTRICALLY HEATEDELEMENTS Filed Feb. 25. 1929 lllllll W2 J da/i207 7 W Patented Mar. 10,1931 UNITED \VALTER S. Iv'ZARVIN AND CARL L. SIRE 3 OBS TO IILETALWAT-1E CORPCSP: L Z0N7 OF IT] e3 FUSIBLE SWITCH FOR- ELECTEECAApplication filed February 23, 1929.

This invention relates to new and useful improvements in fusibleswitches for electrically heated elements.

One of the objects of my invention is the 5 provision of a fusibleswitch adapted to be incorporated in the circuit for an electricalhheated element which is particularly ad for use in connection withcofiee percol and similar articles, although its ap tion to theseparticular articlesi Another object of the invention is the provision ofa fusible switch adapted to be positioned within the circuit of anelectrically heated element and is so constructed 7 arranged that it maybe cgiic placed s the position or removed and the fusible switch 1 a lmember 6 may be readily replaced when burned out; r

A further object of: the invention is provision of a fusible switchadapted to c used in connection with the electrically heats i element ofcoffee percolators or similar orticles whereby when the heat beneath tnearticle beingheated reaches a certain degree, the switch will b meltedor fused in order to disconnect the circuit to the electrically heatedelement, so as to prevent overheatii of the parts around the element.

A further object of the invention is the provision of a device of theabove character ivherein the parts are assembled in a single unitadapted to be placed in position and y V 3 ccnfiest; n m 6031. maintaininoperative position by n l mags the securing member carried by theelectrically heated element and whereoy the unit 'inay be quicklyremoved when desired.

WVith the above and other objects 1 the invention consi in he novel teatconstruction, the combination and arra ment of parts hereinafter moretul forth, pointed out in the claims and t in the accon panylng' C fw gwhefel 4 Ellie element 3 a thlcadel bo t 18 filgure 1 15 a 3 VleW 011{311% ll? i which is extended down tnrono'h the can of Figure 2;illustrating the application ct b 9 m d h g b1 end F my devlce; I 1 f Wpted to retain the c i ii pl ce, O J Figure 2 1s a bottom plan vie'e ora cone \YlllCll in turn will rel in D1399 '1 percolator showing theapplication of me i: "-.111Sii-tl1 top of the base menioer 1 r 7 devicewith parts thereof broken and ie c n member 8 is provided with aninillustrated in cross section. 20 being" located ad Referring moreparticularly to the drawf5 g9 1 th h ings wherein the lnvention and itsapphcadi toward the switch. The port 21 is used for permit ting passageof the conductors which lead to the terminals of the heating element,and also permits circulation of air beneath element 8.

it will be apparent iror the foregoing that when the element 3 becomesoverheated, the spacewithin the base 6 will become heated to apredetern'iined degree and fuse or melt th switch element breaking theconnection to 10 the element 3. it will be noted t t the con structionof the swfle'h member lo is of such nature 1 l z 1 1111 be apparent thath advent 0" Q e l .proveinent will lie in the fact at a y connecting upa coiiee percelator vith current turned on will not necessarily Lil raveto main in a watch in order to revent over-h urrent to the y broken whethe article, but the will be quicki'nproved lenient e ting element andprevent e container,

have shown and described the p 2 d el'nbodiment o1 our invention, itwill be that slight changes may be invention into practice withoutdeparting from the spirit of the same or the scope of the appendedclaims. A

id e claim 7 i. In device of the character described,

40 an electrically heated el eaent, a cap member d adjacent tbel inentand enclosing said cap having a pluopenings a erein, means forming 11 beween the element and a source to be positioned the path of the heat fromthe element whereby to break he connection between the element andsource t electrical supply when the element is heated to a predetermineddegree.

direc ly opposite one of the open-,

3. In a device of the class described, a pair of spaced terminals, apair of spaced plugs remote from the terminals, a conductor forming adirect connection between one of the plugs and one of the terminals,spaced conplates, fusible element connecting i plates, a conductorconnecting one of said plates with the other termina a conducconnectinthe other plate with the other a device of the character described,

really eated element, a cap for enteiminals of said element, having ofopenings, cans forming coni tween the elent and a source of i met supplvand a fusible switch removc'ed within the connections between and sourceof electrical supply,

' y opposite one of the ioned the path of the the element whereby to souoi y when the element is V into degree.

y that we claim the foregoing ntc set .tiur hands at Two Rivers,

enitowoc and State of Wis-- *ALTER- S. MARVIN. Gilli L. SIEENHORN.

COllSlil.

